Soutenances de Thèses 2021

Nadia Milazzo

30 juillet 2021
Institut für Theoretische Physik, Universität Tübingen

Soutenance de thèse

Optimal measurement strategies for quantum state and quantum channel estimation

The rapid advance of quantum information technology requires precise control and manipulation of quantum systems; in particular, it is essential to certify that quantum processors truly work quantum mechanically, in order to validate experiments and their results. The problem of certification of quantum states and devices is a demanding one, thus many attempts have been put forward to find ways of efficiently testing their basic functionalities, such as their entanglement properties. The aim of the present thesis is to find optimal strategies for the estimation and characterization of quantum states and channels, with a special focus on entanglement correlations.
We consider in particular the certification of entanglement across a given partition of a multi-qubit system, when only partial information about the corresponding quantum state is available. We also discuss the problem of separability of quantum channels in terms of the Choi matrix representation, and we shall mention some preliminary results about quantum functional testing based on Bayesian adaptive strategies. As a separate issue, we also highlight the relevance of quantum information in the context of analogue gravity.

 

Directeurs : Olivier Giraud, Daniel Braun

Jury : Otfried Gühne, Jens Siewert, Rosa Tualle Brouri, Igor Lesanovsky


Alexandre Pricoupenko

6 septembre 2021
LPTMS, Grand amphithéâtre du bâtiment Pascal

Soutenance de thèse

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Directeur : Dmitry Petrov

Jury : Frédéric Chevy, Mario Gattobigio, Denis Lacroix, Luis Santos, Leticia Tarruell


Hugo Le Roy

4 octobre 2021
LPTMS, Petit amphithéâtre du bâtiment Pascal

Soutenance de thèse

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Directeur : Martin Lenz

Jury :


Lucas Varela Alvarez

17 novembre 2021
LPTMS, Grand amphithéâtre du bâtiment Pascal

Soutenance de thèse

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Directeur : Emmanuel Trizac, Gabriel Tellez

Jury :